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1

Oosthuizen, Gert Adriaan. "Wear characterisation in milling of Ti6Al4V : a wear map approach." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5426.

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Thesis (PhD (Industrial Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Information on the milling of Ti6Al4V is limited; with most studies concluding that it is not possible to obtain a significant increase in the material removal rate (Qw). Tool wear maps can be a diagnostic instrument for failure analysis. Cutting speed (vc), maximum un-deformed chip thickness (heMax) and the radial immersion percentage (ae/Ø %) are the key variables in understanding the milling of titanium alloys. The objective of this research study was to construct tool wear maps for the milling of
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2

De, Villiers Danielle. "Accelerated wear protocols for understanding clinical wear in modern hip prostheses." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/7981.

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Success of total hip replacements is well reported however, failures as a result of wear processes and the biological response to these products continue to challenge the orthopaedic community. Lately, corrosion of metal surfaces as well as wear particles have seen particular interest with elevated blood cobalt levels widely reported in patients receiving metal-on-metal (MoM) hip replacements. Some instances have also reported this in patients with metal-on-polyethylene (MoP) components and these corrosion products are believed to contribute to hypersensitivity reactions reported. This thesis
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3

Dahlström, Alexander. "Wear mechanisms in austenitic stainless steel drilling : A comprehensive wear study." Thesis, KTH, Materialteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175771.

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This thesis is meant to serve as part of a competence platform for future product development projects at Sandvik Coromant AB, Solid Round Tools Department, Västberga, Sweden. The project objective is to gain generic knowledge of the wear mechanisms that restrict tool lifetime when drilling austenitic stainless steel. Thus, identifying if the weakest link of the tool is located within the coating, the coating adherence or in the strength of the substrate. A theoretical review of the work-piece and tool materials has been conducted as a background, along with definition of tool geometry and pr
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4

Gåård, Anders. "Wear in sheet metal forming." Licentiate thesis, Karlstad University, Faculty of Technology and Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1592.

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<p>The general trend in the car body manufacturing industry is towards low-series production and reduction of press lubricants and car weight. The limited use of press lubricants, in combination with the introduction of high and ultra-high strength sheet materials, continuously increases the demands of the forming tools. To provide the means of forming new generations of sheet material, development of new tool materials with improved galling resistance is required, which may include tailored microstructures, introducing of specific(MC, M(C,N))carbides and nitrides, coatings and improved surfac
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Odelros, Stina. "Tool wear in titanium machining." Thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176944.

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The present work was performed at AB Sandvik Coromant as a part in improving the knowledge and understanding about wear of uncoated WC/Co cutting tools during turning of titanium alloy Ti-6Al-4V. When machining titanium alloys, or any other material, wear of the cutting tools has a huge impact on the ability to shape the material as well as the manufacturing cost of the finished product. Due to the low thermal conductivity of titanium, high cutting temperatures will occur in narrow regions near the cutting edge during machining. This will result in high reaction and diffusion rates, resulting
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6

Paulls, Andrew. "Wear mechanisms in screw presses." Thesis, University of Hull, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395505.

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7

Robb, Nigel Douglas. "Epidemiological studies in tooth wear." Thesis, King's College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308314.

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8

Watkins, Shaun Gareth. "Wear fatigue in nickel superalloys." Thesis, Swansea University, 2015. https://cronfa.swan.ac.uk/Record/cronfa43108.

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To date, work to assess the progression of wear and the effects of wear damage on low cycle fatigue has tended to be focused on specific components and their operating conditions. Although effective in the short term to solve today’s problems, these efforts often deliver insufficient understanding of the overall design space limits to have much influence of future component design. Therefore, the following research attempts to understand how wear damage progresses and how it impacts on fatigue performance in order to develop more accurate lifing models to predict the behaviour and life of real
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9

Gåård, Anders. "Wear in sheet metal forming /." Karlstad : Faculty of Technology and Science, Materials Engineering, Karlstad University, 2008. http://www.diva-portal.org/kau/abstract.xsql?dbid=1592.

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10

Jungedal, m. "Mild impact wear in a concrete mixer : An evaluation of wet abrasive wear." Thesis, KTH, Materialvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-161557.

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The concrete mixer industry is affected by abrasive wear under both dry and wet conditions. An upgrade of the material inside the drums to high abrasion resistant steel grades can improve the lifetime and offer the possibility to reduce the weight of the drum. A new wear testing apparatus was designed to simulate the wear conditions in a concrete mixer truck with the aim to investigate the relative wear resistance for a number of steel grades. Three tests were performed under wet conditions using 16-25 mm crushed granite. The tests focused on the wear resistance under sliding and impact wear f
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Adeva, Rodil Teresa. "Edge effect on abrasive wear mechanisms and wear resistance in WC-6wt.% Co hardmetals." Thesis, Karlstad University, Division for Engineering Sciences, Physics and Mathematics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-375.

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<p>Wear of hardmetals is a complicated topic because the wear resistance and the wear mechanisms are influenced by microstructural factors. Although edge wear resistance has a vital importance, most of the researches made in laboratories are related to flat wear resistance using coarse abrasive paper. This situation produces problems with the prediction of abrasive wear behaviour and with the estimation of the lifetime of cutting edges of different kinds of tooling.</p><p>Several studies have been done in order to clarify edge wear behaviour. It has been published correlations of the edge toug
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12

Nilsson, Rickard. "On wear in rolling/sliding contacts." Doctoral thesis, KTH, Machine Design (Div.), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122.

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<p>The aim of this thesis is to increase the understanding of wear in rolling/sliding contacts such as the wheel-rail contact for railroads and the roller-washer contact for roller bearings.</p><p>The Stockholm commuter train network has been the subject of papers A and B in this thesis in which the wear and surface cracks on rails has been observed for a period of three years. By comparing the wear depth with the crack length, equilibrium between these two damage mechanisms was found for a lubricated rail. By using a lubricant with friction modifiers the stresses was low enough to prevent cra
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13

Hosepyan, Yetvart. "Tool wear monitoring in face milling." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29973.

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The purpose of this thesis is to investigate tool wear monitoring using Fourier Series simulation of steady state cutting forces. These simulations show that mean and fundamental values are all that is required to accurately predict immersion and tool wear (high frequency terms are ignored). It is found that the ratio of the magnitude of the fundamental values of force over the quasi-mean resultant force are insensitive to wear, while the same ratio is found to change markedly with immersion. Due to the nature of wear and different cutting conditions, two different wear identification methods
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14

Ghasempoor-Nobandgany, Ahmad. "On-line wear estimation in turning." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/NQ35961.pdf.

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15

Østrem, Øyvind. "Cathode wear in Hall-Héroult cells." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20240.

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16

Speyer, Andrew James. "Wear/corrosion sensing in flowing seawater." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269992.

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17

MARQUES, RENNER GUILHERME DA COSTA. "STUDY OF FEASIBILITY IN REPLACING IN A CENTRIFUGAL PUMP THE STATIC WEAR RING BY A FLOATING WEAR RING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26598@1.

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PETRÓLEO BRASILEIRO S. A.<br>Grande parte dos sistemas de bombeamento existentes em refinarias é do tipo centrífuga com rotor em balanço. Alguns desses sistemas, que foram fabricadas antes da década de 80, ainda estão sendo usadas em refinarias no Brasil. Tipicamente estes equipamentos possuem rotores muito flexíveis. Isto ocorre devido ao alto valor da razão entre a distância entre mancais e o diâmetro do eixo e também por causa da substituição de gaxetas, que oferecem rigidez, por selos mecânicos. Como consequência, a resposta dinâmica destes equipamentos é sensível à pequenas variações da f
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Antar, Joyce, and Donya Gholamifar. "CRM in Fashion Companies for men's wear." Thesis, Jönköping University, JIBS, Business Administration, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-472.

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<p>Problem: Modeindustrin har varit omtalad under senare tid och eftersom konkurrensen på denna marknad är hög har det lett till en ökad medvetenhet bland konsumenter och speciellt bland manliga konsumenterna. En förundersökning utfärdad av författarna visade att skapandet av kundrelationer möjliggör för modeföretag att bibehålla en konkurrenskraftig position på marknaden. Undersökningen visade även att eftersom män har en tendens att förbli lojala kunder och tvivlar oftast på att köpa kläder från nya butiker är det viktigt för modeföretag att utveckla och bibehålla relationer med dessa kunder
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Skytte, af Sätra Ulf. "Wear of piston rings in hydrostatic transmissions." Doctoral thesis, KTH, Machine Design (Div.), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-432.

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<p>This study focuses on the wear of piston rings in a hydraulic radial piston motor. The piston ring has to satisfy increasing demands for reliability and longer service life. It has two contacting surfaces, the face and the flank, and operates under a boundary lubrication state.</p><p>This first part of the project aimed to detect and characterise piston ring wear. Measurement by weighing gives an overall value for wear defined as loss of mass. Two-dimensional form and surface roughness measurements show the distribution of wear on the piston ring face in contact with the cylinder bore and t
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Skytte, af Sätra Ulf. "Wear of piston rings in hydrostatic transmissions /." Stockholm : Department of Machine Design, KTH, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-432.

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21

McLennan, Laura. "Tooth wear, microwear and diet in elasmobranchs." Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42779.

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As abundant and widespread apex predators, elasmobranchs play influential roles in the food-web dynamics of marine communities. This has obvious implications for fisheries management and marine conservation. For successful conservation, the ecology of a species must be known. An understanding of extinct species ecology is also useful. Unfortunately, diet a key component of a species’ ecology, is relatively understudied in elasmobranchs. For a majority of elasmobranch species, little or no quantitative dietary data exists. This reflects the limitations of current dietary defining methods. This
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22

Cruwys, Elizabeth. "Tooth wear patterns in modern human populations." Thesis, University of Cambridge, 1987. https://www.repository.cam.ac.uk/handle/1810/272343.

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23

Quirke, SJ. "Abrasive wear testing of steels in soil." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/21798.

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Bibliography: pages 133-136.<br>A survey has been made of the quality and type of materials used for tillage tools in South Africa. Conclusions have been drawn regarding the inadequacy of the manufacturing processes used and the resultant quality of the tool material. A rig has been designed for the abrasion testing of materials in soil. The reproducibility of the method has been shown to be high and an evaluation has been made of the relative wear resistance of a series of ·heat treated steels. A medium carbon boron steel has been shown to have great promise as a tillage tool material because
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24

Spero, Christos. "Simulation of wear in coal pulverising mills." Thesis, Queensland University of Technology, 1993. https://eprints.qut.edu.au/107113/1/T%28BE%26E%29%20378.pdf.

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Large-scale mills are used to pulverise coal for combustion in heat and steam raising plants in many manufacturing and ore processing industries, and in particular in power generating utilities. The cost of mill maintenance attributable to wear of pulverising elements typically ranges from 0.1 to 1. 0 A$/t of coal pulverised, depending on the characteristics of the mill, the properties of the wearing alloys, and the properties of the coal. Abrasiveness of coal is usually assessed by any of a number of empirical indices, none of which have been related to wear in large-scale mills in any detai
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25

QURESHI, WAQAR AHMED. "Prediction of fretting wear in spline couplings." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2675109.

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The original contribution of this work is modeling of fretting wear in aero-engine spline couplings widely used in aero-industry to transfer power and torque. Their safe operation is very critical with respect to flight safety. They consist of two components namely hub and shaft. As they are of light weight, usually it is difficult to realize a perfect alignment. To allow for misalignment, their teeth are designed to be of crowned shape. The crowing allows a degree of misalignment without concentration of stresses which is otherwise inevitable if a misalignment is introduced in case of stra
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Olivera, Jorge Manuel Figueiredo Coelho de. "Mechanisms of machine wear in the extrusion cooking of foods." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328089.

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27

Jon, Sundh. "On wear transitions in the wheel-rail contact." Doctoral thesis, KTH, Maskinkonstruktion (Avd.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11563.

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Wear transitions in the wheel–rail contact are of increasing interest since the general trend in railway traffic is toward increased velocities and axle loads. Curving increases the risk of flanging, causing the contact to change from an almost pure rolling wheel tread–rail head contact to more of a sliding wheel flange–rail gauge contact on the high rail in curves. Under wheel flange–rail gauge contact conditions, wear transitions to severe or catastrophic wear will occur if the contact is improperly lubricated. Such a transition is the most undesirable transition in the wheel–rail contact, a
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Snilsberg, Brynhild. "Pavement wear and airborne dust pollution in Norway." Doctoral thesis, Norwegian University of Science and Technology, Department of Geology and Mineral Resources Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2173.

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<p>In several large cities in Norway the traffic volume is high. The use of studded tires and other friction enhancing measures during winter leads to significant pavement wear, which in turn leads to an increase in the amount of airborne particulate matter, often exceeding the limits set in the ambient air regulation. This represents a nuisance or health risk for people being exposed to the pollution. According to regulations set by the European Union particulate matter is measured and regulated through mass concentration of particles less than 10 μm in diameter (PM10). However, studies of he
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Olver, Andrew Vernon. "Wear of hard steel in lubricated, rolling contact." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/11466.

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30

Mozgovoy, Sergej. "High Temperature Friction and Wear in Press Hardening." Licentiate thesis, Luleå tekniska universitet, Maskinelement, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26232.

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In the automotive industry, press hardening is usually employed to produce safety orstructural components from advanced high–strength steels. This hot forming process, andthermomechanical forming processes in general, is highly dependent on friction betweentool and workpiece as friction affects and controls the deformation of the workpiece.However, friction is also directly associated with wear of the forming tools. Tool wear isa complex system response depending on contact conditions and is a serious issue whenit comes to process economy as it reduces the service life of the tool. Therefore,
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Waara, Patric. "Lubricants influence on wear in sharp rail curves /." Luleå : Division of Machine Elements, Luleå University of Technology, 2006. http://epubl.ltu.se/1402-1544/2006/11/.

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32

Howie, Donald William. "The role of wear particles in prosthesis loosening /." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09PH/09phh861.pdf.

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33

潘榮光 and Wing-kwong Digby Pun. "Factors affecting wear land stress in metal cutting." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31231330.

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34

Davey, S. M. "Multidirectional wear of polyethylene in hip replacement components." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398153.

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35

Huang, Ji-Wei. "Wear tolerance in perennial ryegrass (Lolium perenne L.)." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389474.

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36

Nortje, Hermann. "An investigation of fretting wear in aerospace applications." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17851.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Fretting wear results in the loss of fit and tolerance at contact interfaces. The aerospace and aircraft industry is severely impacted by fretting wear and fretting fatigue that frequently occurs in turbo machinery and riveted structural connections. There have been numerous studies, investigating the fretting phenomenon for these aerospace applications. Literature available in regard to fretting wear encountered in these aerospace applications is limited. This study is therefore aimed at investigating the fretting wear
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Vasic, Gordana. "Modelling of wear and crack initiation in rails." Thesis, University of Newcastle upon Tyne, 2013. http://hdl.handle.net/10443/1914.

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The ‘Dynarat’ computer simulation of ratcheting wear and failure of rail steel has been developed at Newcastle University over the past decade based on laboratory tests and analysis of British normal grade (R220) rail steel. The aim of this thesis is to develop material models for Dynarat that can be used to predict wear and rail life for R260 rail steel, which is used widely in Europe and increasingly in Britain, and also for newer premium grade pearlitic rail steels. Laboratory twin-disc testing and metallurgical material analysis were used to obtain data for characterising and modelling mat
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Lilley, Peter A. "An investigation of wear in lower limb endoprostheses." Thesis, Kingston University, 1994. http://eprints.kingston.ac.uk/20574/.

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This dissertation investigates the friction and wear behaviour of the predominant materials used in lower limb prostheses. plastic debris is common as a result of articulation at heavily loaded joint surfaces but metal debris can also be generated at the soft-tissue interface where the contact forees are much lower. The resultant tissue staining, and the wear products in general, are a matter of great concern: the plastic particles migrate between the bone-implant interface and have been implicated in the process of bone resorption with subsequent loosening of the implant and there is some evi
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Alshraiedeh, Juman. "Wear-out Leveling in Network on Chips (NoCs)." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1492677926079357.

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Saeli, Ashley Nicole Saeli. "A Day in the Park: Childrens Wear Collection." Kent State University Honors College / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1525717417177765.

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41

Steward, N. R. "The wear of materials in hydraulic transport pipelines." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/8310.

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Bibliography: leaves 60-68.<br>The hydraulic transportation of particulate solids through pipelines results in wear of the pipeline walls. The lifetime of the pipeline is determined by this rate of material loss and is therefore critical to the designer. Due to the small amounts of material lost in in-situ tests, requiring in many cases in excess of 1000 hours testing, an accelerated test procedure is necessary. This work introduces an accelerated method of evaluating materials under simulated pipeline wear conditions. The solids in the slurry and the materials were closely monitored to attain
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Cuddon, Alan. "The wear of materials in an ash conditioner." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/17665.

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Includes bibliographical references.<br>The abrasive nature of fly ash handled in large coal-fired power stations results in unacceptable material and maintenance costs in ash-water mixing plant. Wear testing has been carried out in situ using a variety of generic materials. A ranking order of wear performance has been established both as a function of material and operating costs, and it has been demonstrated that impressive cost savings can be effected by the use of ceramic-coated steel mixing blades. The performance of such composites has been found to be sensitive to the design and method
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Hodgson, Stuart G. "Mild wear in dry and lubricated sliding systems." Thesis, Aston University, 1988. http://publications.aston.ac.uk/8079/.

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A vertical pin on horizontal disc machine has been used to conduct a series of experiments in air under dry and lubricating sliding conditions. For dry sliding low load and speed combinations were chosen to correspond to the mild wear region below the Welsh T1 transition. Lubricated tests were conducted under flooded conditions using Esso Technical White Oil alone and with a 0.1% stearic acid additive, for load and speed ranges that produced substantial amounts of asperity contact and thus a boundary lubricated regime of wear. The test material in all cases was AISI 52100 steel, for unlubricat
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Pun, Wing-kwong Digby. "Factors affecting wear land stress in metal cutting /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12361409.

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45

George, Christian Owens. "Quantification of wear in Equus teeth from Florida." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001146.

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46

Swenson, Brendon James. "Interproximal tooth wear: an in vitro pilot study." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2641.

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Objective: The purpose of this study was to develop a method of accurately quantifying the wear facet, and relating the wear facet size to the forces applied by the Iowa Tooth Wear Machine. Methods: Ten un-erupted third molars were used for this study. The teeth were mounted in the Iowa Tooth Wear Machine with opposing proximal surfaces. Samples were run with a 0.250mm stroke length for 645,120 cycles under 5 pounds of weight. An optical scanner was used to digitize the initial and final interproximal wear facets. AnSur© software
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Smith, Nicholas Rindels. "Interproximal tooth wear: an in vivo pilot study." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1084.

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The purpose of this pilot study was to develop a method to quantify the surface area of interproximal wear facets present in the human dentition. Another aim was to investigate the reliability of this method and possible correlations between the amount of interproximal tooth wear and vertical craniofacial morphology. The study was carried out on 24 adolescent individuals immediately prior to orthodontic treatment. Following interproximal contact separation of one week, interproximal impressions were taken with polyvinyl siloxane and a positive stone model was fabricated with type IV dental sto
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Besong, A. A. "The influence of tribological conditions on the wear and morphology of UHMWPE wear particles in total artificial joints." Thesis, University of Leeds, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538106.

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49

Dowgiewicz, Jason M. "Inter- and Intra-Specific Variation in Wear Mechanisms in Agrostis: I. Wear Tolerance and Recovery Ii. Anatomical, Morphological and Physiological Characteristics." Amherst, Mass. : University of Massachusetts Amherst, 2009. http://scholarworks.umass.edu/theses/243/.

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50

Lima, Mariana Sá. "Will men in Portugal wear make-up in the future?" Master's thesis, NSBE - UNL, 2010. http://hdl.handle.net/10362/10328.

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Annotation:
A Work Project, presented as part of the requirements for the Award of a Masters Degree in Management from the NOVA – School of Business and Economics<br>This work project aims to: 1) Explore weather men in Portugal will wear make up in the future; 2) Analyze changes in male grooming from the beginning of the 1900´s until the present time. 3) Analyze how cosmetic brands are branding to men. In order to be able to answer the questions above, secondary data was collected in the form of consumer studies and research, newspaper articles and other literary material. Since this market is stil
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